package com.search.util;

public class StringUtil {
	/**
	 * 判断字符串是否为空
	 * 
	 * @param str
	 * @return true、false
	 */
	public static boolean isEmpty(String str) {
		if (str == null || str.trim().length() == 0 || "null".equals(str)) {
			return true;
		}
		return false;
	}
}